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Acta Mechanica Sinica 2011年第6期27卷 1081-1090页

作者： Li Wang Mei-Wen An Xiao-Na Li fang yang yang liu Institute of Applied Mechanics and Biomedical Engineering Taiyuan University of Technology 030024 Taiyuan China

To probe the contributions of polar cortical cytoskeleton and the surface tension of daughter cells to intercellular bridge thinning dynamics during cytokinesis,we applied cytochalasin D（CD） or colchicine（COLC） in a highly localized manner to polar regions of dividing normal rat kidney（NRK） *** observed cellular morphological changes and analyzed the intercellular bridge thinning trajectories of dividing cells with different polar cortical *** blebbistatin（BS） application was used to obtain cells losing active contractile force *** results show that locally released CD or colchicine at the polar region caused inhibition of cytokinesis before *** treatment at phases after ingression allowed completion of cytokinesis but dramatically influenced the trajectories of intercellular bridge *** single polar cortical actin induced transformation of the intercellular bridge thinning process,and polar cortical tension controlled deformation time of intercellular *** study provides a feasible framework to induce and analyze the effects of local changes in mechanical properties of cellular components on single cellular cytokinesis.

关键词： Cytokinesis Normal rat kidney epithelial cells Intercellular bridge Polar cortical cytoskeleton - Cortical surface tension

Three-dimensional antimony sulfide anode with carbon nanotube interphase modified for lithium-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2021年第10期28卷 1629-1635页

作者： Qi Wang Yue-yong Du Yan-qing Lai fang-yang liu Liang-xing Jiang Ming Jia School of Metallurgy and Environment Central South UniversityChangsha 410083China

Antimony sulfide(Sb_(2)S_(3))is a promising anode for lithium-ion batteries due to its high capacity and vast ***,the low electronic conductivity and severe volume change during cycling hinder its *** our work,a three-dimensional(3D)Sb_(2)S_(3) thin film anode was fabricated via a simple vapor transport deposition system by using natural stibnite as raw material and stainless steel fiber-foil(SSF)as 3D current collector,and a carbon nanotube interphase was introduced onto the film surface by a simple dropping-heating process to promote the electrochemical *** 3D structure can greatly improve the initial coulombic efficiency to a record of 86.6% and high reversible rate capacity of 760.8 mAh·g^(-1) at 10 *** carbon nanotubes interphase modified,the Sb_(2)S_(3) anode cycled extremely stable with high capacity retention of 94.7% after 160 *** work sheds light on the economical preparation and performance optimization of Sb_(2)S_(3)-based anodes.

关键词： three dimensions antimony sulfide anode carbon nanotubes interphase lithium-ion batteries

Preparation and Kinetics of a Novel Glutathione Peroxidase Mimic——Selenium-modified Hyaluronic Acid

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Chemical Research in Chinese Universities 2007年第3期23卷 325-328页

作者： CHEN Jia HONG Shui-sheng AN yang JIANG Guang-zhi ZHANG Bo-xun fang Xiang-yang liu Lan-ying TENG Li-rong College of life Science Jilin University Changchun 130021 P. R. China

A selenium-modified hyaluronic acid（HA） compound（SeHA） was synthesized as a mimic of glutathione peroxidase（GPX）. IR and NMR spectra of SeHA predict that the --CH2OH group of the N-acetyl-D-glucosamine in HA was modified by group --Sell. There are averagely 152 --Sell groups in one SeHA molecule. The GPX activities are 103.88, 32. 15 and 152. 71 U/μmol, respectively, when the substrates were H2O2, BuOOH and CuOOH. Ping-pong mechanism was observed in the steady-state kinetic studies of the reactive oxygen species（ROS） consuming reaction. Result of reactions of SeHA with free radical capturer 2,6-di-tert-butyl-4-methylphenol（BHT） shows that the catalysis is based on a non-free radical-mechanism and the SeHA can not be inhibited by iodoacetate, an enzyme inhibitor.

关键词： Selenium-modified hyaluronic acid GPX Preparation Kinetics

The influence of Disposition Effect on Stock Return in China

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Journal of Systems Science and Information 2006年第1期4卷 53-57页

作者： Xin yang fang liu International Trade and Finance Department School of Economics and Management Tsinghua University Beijing 100084 China

This paper introduces the disposition effect into asset pricing process, and sets dynamic equilibrium model on which we can discuss the pattern of risk assets＇ returns. On base of theory results, we use data of China stock market to analyze the influence of disposition effect on stock return. The empirical study result confirms the disposition effect＇s existence in China stock market and it does affect the stock return.

关键词： behavioral finance asset pricing model disposition effect

Reductive acid leaching of valuable metals from spent lithium-ion batteries using hydrazine sulfate as reductant

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Transactions of Nonferrous Metals Society of China 2020年第8期30卷 2256-2264页

作者： Jian yang Liang-xing JIANG fang-yang liu Ming JIA Yan-qing LAI School of Metallurgy and Environment Central South UniversityChangsha 410083China

Hydrazine sulfate was used as a reducing agent for the leaching of Li,Ni,Co and Mn from spent lithium-ion *** effects of the reaction conditions on the leaching mechanism and kinetics were characterized and examined.97%of the available Li,96%of the available Ni,95%of the available Co,and 86%of the available Mn are extracted under the following optimized conditions:sulfuric acid concentration of 2.0 mol/L,hydrazine sulfate dosage of 30 g/L,solid-to-liquid ratio of 50 g/L,temperature of 80℃,and leaching time of 60 *** activation energies of the leaching are determined to be 44.32,59.37 and 55.62 k J/mol for Li,Ni and Co,*** performing X-ray diffraction and scanning electron microscopy in conjunction with energy dispersive X-ray spectroscopy,it is confirmed that the main phase in the leaching residue is *** results show that hydrazine sulfate is an effective reducing agent in the acid leaching process for spent lithium-ion batteries.

关键词： spent lithium-ion batteries reductive acid leaching hydrazine sulfate leaching mechanism kinetics

Regeneration of Al-doped LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) cathode material by simulated hydrometallurgy leachate of spent lithium-ion batteries

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Transactions of Nonferrous Metals Society of China 2022年第2期32卷 593-603页

作者： fang-cheng LI Gang ZHANG Zong-liang ZHANG Jian yang fang-yang liu Ming JIA Liang-xing JIANG School of Metallurgy and Environment Central South UniversityChangsha 410083China Zhongtian Supercapacitor Technology Co. Ltd.Nantong 226463China Zhongtian Emerging Materials Co. Ltd.Nantong 226463China

A uniform Al-doped LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) cathode material was prepared using a coprecipitation method to take advantage of the positive effect of Al on regenerated NCM(Ni,Co,Mn)cathode materials and ameliorate cumbersome and high-cost impurity removal processes during lithium-ion battery *** the Al^(3+) content in the leachate was 1 at.%with respect to the total amount of transition metals(Ni,Co,and Mn),the produced Al-doped NCM cathode material increased concentrations of lattice oxygen and Ni^(2+).The initial specific capacity at 0.1C was 167.4 mA·h/g,with a capacity retention of 79.1%after 400 cycles at ***,this Al-doped sample showed improved rate performance and a smaller electrochemical *** findings provide a reference for developing industrial processes to resynthesize cathode materials with improved electrochemical performance by incorporating Al^(3+) impurities produced during lithium-ion battery recycling.

关键词： spent lithium-ion battery regeneration Al doping ternary cathode material coprecipitation

Preparation of Sb2O3/Sb2S3/FeOOH composite photoanodes for enhanced photoelectrochemical water oxidation

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Transactions of Nonferrous Metals Society of China 2020年第6期30卷 1625-1634页

作者： yang PENG Jia CHEN Liang-xing JIANG Tian-yi WANG Hai-chao yang fang-yang liu Ming JIA School of Metallurgy and Environment Central South UniversityChangsha 410083China BOE Technology Group Co. Ltd.Chengdu 611731China

A novel Sb2O3/Sb2S3/FeOOH photoanode was fabricated via a simple solution impregnation method along with chemical bath deposition and *** X-ray diffractometry,Raman measurement,and X-ray photoelectron spectroscopy show that the Sb2O3/Sb2S3/FeOOH thin films are successfully ***−EDS analyses reveal that the surface of Sb2O3/Sb2S3 thin films becomes rough after the immersion in the FeCl3 *** optimized impregnation time is found to be 8 *** FeOOH co-catalyst loaded Sb2O3/Sb2S3 electrode exhibits an enhanced photocurrent density of 0.45 mA/cm2 at 1.23 V versus RHE under simulated 1 sun,which is approximately 1.41 times compared to the photocurrent density of the unloaded *** the further tests of UV−Vis spectroscopy,the electrochemical impedance spectra,and the PEC measurements,the enhancement can result from the increased light-harvesting ability,the decreased interface transmission impedance,and the remarkably enhanced carrier injection efficiency.

关键词： Sb2O3/Sb2S3 FeOOH co-catalyst photoanode carrier injection efficiency

Catalytic effects of NH4+ on hydrogen evolution and manganese electrodeposition on stainless steel

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Transactions of Nonferrous Metals Society of China 2019年第11期29卷 2430-2439页

作者： Fan yang Liang-xing JIANG Xiao-ying YU fang-yang liu Yan-qing LAI Jie LI School of Metallurgy and Environment Central South UniversityChangsha 410083China

The effects of(NH4)2SO4 concentration(c((NH4)2SO4))on hydrogen evolution and Mn electrodeposition on stainless steel(SS)in different potential ranges were investigated by linear sweep voltammetry(LSV),electrochemical impedance spectroscopy(EIS),potentiostatic polarization,chronoamperometry,scanning electron microscope(SEM)and X-ray diffraction(XRD)*** results show that the NH4^+discharge reaction(NDR)intensifies the overall hydrogen evolution kinetics,and the NDR is catalyzed by increasing c((NH4)2SO4)and *** electro-crystallization of Mn on SS follows a three-dimensional progressive nucleation and diffusion-limited growth *** the over-potential could accelerate the nucleation rate and also cause the decline of the nucleation *** absorbed Mn^2+preferably discharges at low *** c((NH4)2SO4)at medium over-potential could improve the current efficiency and produce more block-like *** nucleation process is suppressed by increasing c((NH4)2SO4)at high over-potential,at which the formation of columnar grains with higher hydrogen contents becomes prevailing.

关键词： ammonium sulfate manganese electrodeposition hydrogen evolution stainless steel cathode

Effects of U0126 on growth and activation of mitogen-activated protein kinases in Aspergillus fumigatus

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Chinese Medical Journal 2013年第2期126卷 220-225页

作者： MA Dong-mei JI Ya-juan yang fang liu Wei WAN Zhe LI Ruo-yu Department of Dermatology Peking University First HospitalResearch Center for Medical Mycology Peking University Beijing100034 China

Background Invasive aspergillosis （IA）, which is mainly caused by Aspergillus fumigatus （A. fumigatus）, is a major cause of morbidity and mortality in immunocompromised patients. Despite considerable progress in currently available antifungals the mortality still remains high in critically ill patients. U0126 which is a highly selective inhibitor of MEK1 and MEK2 in the RAF/MEK/ERK pathway in mammalian cells has been demonstrated to have an anti-proliferative role in cancer cells. The purpose of this study was to explore the role of U0126 on growth inhibition and activation of mitogen-activated protein kinases （MAPKs） in A. fumigatus. Methods Germination percentage and hyphae growth in A. fumigatus treated with U0126 were observed and compared with untreated controls. Western blotting analysis was used to detect changes in activation of SakA, MpkA and MpkB. Results U0126 inhibited germination and hyphae growth in A. fumigatus and enhanced the phosphorylation of SakA and MpkA under oxidative stress. U0126 at 10 pmol/L did not block the activation of MpkB during nitrogen starvation stress. Conclusion U0126 shows promise as an antifungal candidate and the MAPK pathway may be a possible antifungal drug target for A. fumigatus.

关键词： Aspergillus fumigatus protein kinase inhibitors mitogen-activated protein kinases

Anomalous quality factor evolution of induced transparency in a virtualized coupled-oscillator system

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 148-155页

作者： Yunhan yang Han Jia Tuo liu Yuzhen yang Jun yang Key Laboratory of Noise and Vibration Research Institute of Acoustics Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Acoustics Institute of Acoustics Chinese Academy of Sciences

The phenomenon of induced transparency, characterized by a high quality(Q) factor, holds significant importance in the fields of high-precision sensing, energy storage and wave manipulation. Conventional transparency systems are often constrained by the limited experimentally accessible parameter space and the lack of independent control over intrinsic parameters, thereby hindering advanced research on high-Q effects. Here we propose a virtualized coupled-oscillator system that enables reconfigurable induced transparency in the reflection spectrum. By virtually incorporating a pair of coupled oscillators into an individual acoustic meta-atom, we achieve the manipulation of induced transparency in a decoupled, wide-ranging, and elaborate manner. Exploiting the diverse evolutions across the intrinsic parameter space, we show experimentally a counter-intuitive increase in the Q-factor of the transparency window, which is attributed to the enhanced dissipation of the bright ***, a constant group delay at the center frequency is observed accompanying this evolution. Our work demonstrates an intriguing platform as well as a novel strategy to engineer high-Q induced transparency phenomenon, and paves the way towards applications in programmable acoustic sensors, filters and slow-wave devices.

关键词： induced transparency acoustic meta-atom high quality-factor scattering programmable intrinsic parameter